It is mainly applied for manual mold design, PVC plastic mould, cement product mold, low melting-point alloy mould, alloy toy crafts, plastic toy, craftwork, gift and stationery, big statue, cultural relic duplication,pad printing orientation, electronic appliances vibration resistance, etc.
Features of RTV-2 manual molding silicon rubber
Low shrinkage, no deformation, good elasticity, high duplication times, etc.
Operations for molding silicon rubber:
Step One:Take 100g of part A and add 2g of part B and mix the silicon rubber and the curing
agent evenly.
Note:Molding silicon rubber is a kind of flowing liquid and it contains two parts. Part A is a kind of white flowing liquid and part B is the curing agent. Remember to mix part A and
part B evenly, otherwise the silicon rubber will be partly solidified and this will give birth to difficulties in your final operation. What's more, the finished moulds will meet a short life. All of these will cause a waste of silicon rubber materials.
Step Two: vacuum pumping
Without exception, this takes less than 10 minutes. Otherwise, it will cause cross linking reaction, and no more further steps will be available.
Step Three: Brushing cast & Perfusion Molding operation
Brushing cast:
a. Evenly brush the mixed silicon rubber on the product which is covered with mold spray with a brush or a brush pen.
b. After the cross linking reaction ( about 30 minutes ),brush a second coat which can increase the tension and tear
strength of the mold.
c. Cover a glass cloth on it after another 30 minutes of a second cross linking reaction, and use a brush pen or a
brush to avoid any interstices.
d. Cover a third coat.
(Note: if you have high requirements for the tension and the tear strength for the mold,please repeat step c and
step d.Hence, the finished silicone moulds will have a good quality and a longer life, which can help you save cost
and increase production efficiency.)
Perfusion Molding
The perfusion molding is an easy way to make molds, Slowly and evenly perfuse the mixed silicon rubber into the
square frame. After the cross linking reaction.
Step Four: Operations for the external mold
a.Make a square frame with four pieces of wooden boards or rubber plates, then place the product which is covered
with the finished silicon rubber mould in the middle.
b.Slowly and evenly perfuse the gypsum to the square frame. Also you can brush the resin on the product which is
covered with the finished silicon rubber mould with a brush or a brush pen. Repeat this process two or three time
after the cross link reaction.
Applications of RTV-2 manual molding silicon rubber
if you need more information ,you can contact with Miss Ava,
Web:hyw(at)szrl(dot)net
Email: hyw(at)szrl(dot)net
Skype:sunava77
Msn:sunavaxu(at)live.cn
TEl: 86 755 89948013
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